package zuoye3;

public class Test {

	public static void main(String[] args) {
		PCI p1=new VideaCard();
		p1.send();
		System.out.println("-------------------");
		PCI p2=new AudioCard();
		p2.send();
		System.out.println("-------------------");
		PCI p3=new NetCard();
		p3.send();
	}
}
